Metal-working machine



Nov. 29,' 1927.

A.' MAUSER METAL WORKING MACHINE l 5 of a constructional example 0f a machine Patented Nov..29l, 1927. i

UNITED.' STATES,

mons MUSEE, or eoLoeNE-MARIENBURQ, GERMANY.

METAL-WORKING MACHINE.

Application led December 12, 1925,-S'eria1 No. 74,991, and in Germany January 15, 1925.

This invention relates to metal working machines and has for 'its principal object to provide a new and improved machine particularly adapted for perfecting the seams of sheet metal articles. Considered more speciiically, one of the objects of the invention is to provide a machine for pressing ornishing the lapped seam usually employed for Joining two ends of a sheet or sheets of metal together in the manufacturing of sheet metal.

articles. Another object is to' provide a machine capable of being. interchangeably used forlperfecting or finishing a welded frame, thereby securing a seam as well as a folded or lapped seam.

A further object' is to provide a built up frame construction' for' the machine which avoids the use of solid castings for the main frame capable of being manufactured at a comparatively low cost, and which, while possessing a certain amount f elasticity -to'permit` a limited amountof yielding of the frame to compensatefor irregularities in thematerial being worked upon, is of suicient rigidity to in- 'sure asubstantially even or constant press'ureupon the wor v Other objects will appear from the following more detailed description and by reference to the' accompanying drawings, in which Fig.- 1 is a side elevation partly 1n section embodying Athe principlesy of my invention;

' Figs. 2, 3 and 4 are sections on the lines 2'- 2, v3--3I and 4-4 of Fig. 1; Figs. v5 and 6 are `enlarged sectional details ofthe rolls shown in Figs. 2 and 3 respectively showing *A I the manner iii which the pairs of rolls er- `form their respective functions in per ectvinga seam.; and Fig. 7 is a-view similar to Figs. 5and 6, showing the outline or profile of therolls used for perfecting' a welded As shown'in the drawings,'the frainezof the machine consists of a pair of side -members 10, constructed of sheet metal, each having a- U-shaped` slot 11 extending `approximately horizontally'of the frame and i midway between: the top and. bottom thereof, the open end ofthe U beingatthe front ofthe machine, The side members are co'nnected Ain spaced relationship by'- channel .i irons12, 13 and 14, Vto which said members a'iresuital-ily secured as bi the rivets 15, said irons ser-vin -to'stren en and brace tle frame, as w as to connect the members10.

The iron' 12 extends along the top and back edge of the frame, the iron 13 along Vthe bottom, and the iron 14, which is bent to forma U, extends around the edge of the U slot 11, as clearly shown in Fig. 1.

Each of the channel irons 12, 13 and 14v -terminate a short distance from the front-of from each side of the bottom bracket is a lug 19V engaging slidably within a vertical slot 20, provided in the side sheet 10.

Rotatably mounted in a bearing bracket 21, bolted between the side sheets at the coI lower front end thereof, is a worm shaft 22 v. having a hand wheel 23 secured to its front end, and a worm 24, secured to its. rear end.

The worm 24 engages within threads cutl in the loweri'ear face of a wedge 25 'which extendsl slidably between the lower roller 'bracket 17 and the bearing-bracket 21.

Mounted rotatably in the roller brackets 16 and 17 are -two co-operating pairs ofseam pressing oi" forming rollers, the front pair consisting of two similarly shaped rolls 26,

27, each having a flange' at one side thereof,

and the flangesbeing oppositely arranged to define a central recess 28 between them, while the rear pair of rolls consists of a cylindricalroll 29 of uniform diameter, anda flanged roll 30` having a central-recess 31v therein, located immediately behind and in alignment withthe recess 28 defined by the,

'.front rolls.

I prefer to provide means for 'driving one set of rollers in order that 'the rollers may function' to pull or feed the article inwardly, while the pressing operation is being per'- formed.- As sh'own, a counter-shaft 32having a pulley 33 on its outer end is journalled in the frame" transversely thereof. The inner end of said counter-shaft carries a bevel. gear -34 meshing with a bevel gear. 35 'on the rear en'd of a, lengitudinal shaft 36, the' los' Y gears 40.

\ finishing similar gear 38 on ajack shaft 39 which drives the top rollers by means of the spur The operation of the machine is as follows: Assuming that a lapped or folding joint is being formed to connect the ends of a single sheet to form it into a hollow cylinder such as indicated at 41 in Fig. 1, and that it is desired to press the folds 36 (Figs. 5 and 6) of such joint into tight engagement and otherwise to perfect the joint; the lower roller bracket 17 is adjusted by means of the hand wheel 23, worm 24 and wedge 25 to bring the faces of the pairs of rollers to the proper position to exert the desired pressure on the work. The work is then inserted into the U slot of the frame with the seam in the central recesses128 and 31, and is pushed rearwardly. The front rolls, as shown more clearly in Fig. 5, press the folds of the seam into tight engagement, and also presses the seam flat against the side of the sheet in such condition that the rear rolls can readily complete the perfecting of the seam. The rear rolls complete the seam by pressing the sheet upwardly about one side of the seam until the folded seam lies entirely on one side of the article only, preflerably the inner side.

The machine may also be employed for finishing a welded seam in which case the plain faced rollers 45 are substituted for the Banged rollers shown in Figs. 2 and 3. The rollers 45, as shown in Fig. 7, are preferably curved slightly on their active or Working faces. yWhen using the machine with the rollers 45 on welded seams, the rollers 45 will press down upon the seam and tend to iiatten out any irregularities in the seam and vat the same time w1ll thoroughly remove the scale, due to the welding operation.

With a machine constructed in accordance with my invention, vit will be seen that the of the seams may be accomplished withreat rapidity, the folds of the finished seam eing pressed tightly. together to form avery strong, tight joint. In addition, the projecting part of the finished seams will be located inslde vof the container so as to be protected from eterior blows or shocks. Moreover, all of the seams will be of substantially the same size, thereby insurin regularity in the appearance of the finished articles. It will also, be seen that as a result g my hand.

will move but such a short distance that the' said rollers and to give an initial closing, vpressure to said .seam while bending it into the plane of the metal of the article, while yin another pair one of the rollers has a smooth periphery and the other two spaced flanges to form a groove for the reception and guidance of the aforesaid longitudinal seam whereby the metal formi-ng the laps of the seamjs forced to lie entirely on one side of said plane and a final compression is exerted both laterally of the sides of the seam and'transversely across the laps thereof.

2. In a seam finishing machine, a built-up frame consisting of a pair of sheet metal side sheets, each provided with a horizontally extending open-endedfslot, and means for securely connecting said rembers in spaced relationship, said means including upper and lower pressed steel, channel iron braces extending along the upper and lower edges esy of said members substantially in parallelism lables said frame to yield slightly to compensate for irregularities in the work operated uponby said machine whilemaintaining a substantially even pressure` on said work. Y

In testimony whereof I have hereunto set ALFONS MAUSER. 

